Chapter VI.

1. The eagle produces three eggs, of which two only are hatched. This is also related in the poems of Musæus. The bird which lays three eggs, hatches two, and brings up but one. This frequently happens; but three young have been seen in the nest. When the young begin to grow, one of them is turned out by the parent, because she dislikes the trouble of feeding it. At this period it is said to be without food, so that it does not capture the young of wild creatures, for a few days the talons are turned back, and the feathers become white, so that it then becomes cruel to its young. The phene[198] receives and brings up the ejected young one.

2. The eagle incubates for thirty days; this is the usual period of incubation for large birds, as the goose and the bustard. Moderately sized birds usually sit twenty days, as the ictinus[199] and hierax.[200] The ictinus usually produces two young ones, and sometimes three; the Ætolian kite, as it is called, sometimes produces four. The raven produces not only two, but, as they say, many eggs, which she sits upon for about twenty days. She also turns out some of her young ones. Many other birds do the same thing; and generally those which produce several turn out one.

3. All kinds of eagles do not behave in the same way to their young; but the pygargus is cruel; and the black eagles are careful for the food of their young; but all birds with crooked talons as soon as their young can fly well beat them and drive them from the nest. And most birds of other classes, as I have before observed, do the same thing; and when they have brought them up, they take no more notice of them, except the crow. This bird cares for its young a long while, for as it flies past them it gives them food after they are able to fly.